meter sizing factor

meter sizing factor

[′mēd·ər ′sīz·iŋ ‚fak·tər]
(fluid mechanics)
A dimensionless number used in calculating the rate of flow of fluid through a pipe from the readings of a flowmeter that measures the drop in pressure when the fluid is forced to flow through a circular orifice; it is equal to K (d / D)2, where K is the flow coefficient, d is the orifice bore diameter, and D is the internal diameter of the pipe.